Stock Pistons

[traumapat]

Well what hes trying to say is becuase HIS is running 300bhp stock, that every 1.8 20v can so vw got it wrong by making the AMK & BAM engines didnt they, what a pickle. Il scrap geting a replacement bam engine and just get an AUQ as these can run 300 + bhp no problem apprently, no no il go further and hit 400 on a stock engine cos there magic

I heard a BAM engine will take 1100HP on stock internals

Bet hes even on stock clutch and origional tyres :O

No im going by tuners such as jabbasport , badger 5, jbs. Who have years of BT experience whereas you have your opinion.

 

[JamJay]

See my edited post ^^^. Your opinion is a valid one and like you say, the way an engine is treated counts for alot. Traumapat, has most likely taken huge care with his so hence it's high tolerence.

Best bet, for the OP is to contact a specialist like JabbaSport and see what they recommend.

 

[Shaunyboy]

No im going by tuners such as jabbasport , badger 5, jbs. Who have years of BT experience whereas you have your opinion.

Not even going to entertain posting anymore

 

[traumapat]

Not even going to entertain posting anymore

Its friday chill Sorry to cause offence.

 

[JamJay]

Love to you all! Love love.

 

[GREY 225]

Ive been told that on a bam LCR rods are good for 340hp, and after that its on risky ground, but at that hp id still be worried about something going bang and if id spent a fair wad of £ on getting that power i think i would change rods just for piece of mind. But i guess how it is mapped can cause alot of problems with boost spikes and also low speed high gear acceleration.

 

[csd_19]

Hmm I was always under the impression the whole range had Mahle pistons..

BadgerBill or one of the tuners on here would know.

Most likely seeing as Mahle moved onto the grounds of VAGs Wolfsburger facilities in Wolfsburg-Fallersleben in 2001 to further strengthen their working relationship.

 

[csd_19]

And further to the above post, a bit of research got me this...


"many thanks for your enquiry for MAHLE pistons.

The standard production pistons used in the VAG AUQ engine manufactured by MAHLE are forged, not cast.

Kind Regards

Paul Grosvenor
MAHLE Aftermarket Ltd.
National Sales Manager (Engine Components)

Spring Vale 70, Spring Vale Business Park, Bilston WV14 0QL West Midlands, Great Britain
http://www.mahle.com"

Simples!

 

[dh00001]

And further to the above post, a bit of research got me this...


"many thanks for your enquiry for MAHLE pistons.

The standard production pistons used in the VAG AUQ engine manufactured by MAHLE are forged, not cast.

Kind Regards

Paul Grosvenor
MAHLE Aftermarket Ltd.
National Sales Manager (Engine Components)

Spring Vale 70, Spring Vale Business Park, Bilston WV14 0QL West Midlands, Great Britain
http://www.mahle.com"

Simples!

thanks

 

[Nautilus]

1. All 1.8T pistons are made by Mahle. Most 1.8T pistons including AUQ are forged, 1.8T/150 pistons made for USA version of Audi A4 are cast.

2. Conventional wisdom of Big Turbo experimenters says that:

- pistons are strong enough to run at 700bhp on a really big turbo setup;
- block, regardless of versions, is bulletproof;
- crankshafts (forged in AUQ/AMK/BAM/a few other setups, cast on some 1.8T/150 versions) were never quoted to have broken;
- rods and cylinder head are the weak links. Both 20mm and 19mm wrist pin rods will give up just above 350bhp, cylinder head will begin to crack between cylinder holes around 450bhp.

3. AMK/BAM engines have 20mm wrist pin rods, AUQs have 19mm. ATC code (2000-2001 Audi TT) had 20mm rods as well, although still quoted at 180bhp.

Regards,

~Nautilus

 

[JamJay]

1. All 1.8T pistons are made by Mahle. Most 1.8T pistons including AUQ are forged, 1.8T/150 pistons made for USA version of Audi A4 are cast.

2. Conventional wisdom of Big Turbo experimenters says that:

- pistons are strong enough to run at 700bhp on a really big turbo setup;
- block, regardless of versions, is bulletproof;
- crankshafts (forged in AUQ/AMK/BAM/a few other setups, cast on some 1.8T/150 versions) were never quoted to have broken;
- rods and cylinder head are the weak links. Both 20mm and 19mm wrist pin rods will give up just above 350bhp, cylinder head will begin to crack between cylinder holes around 450bhp.

3. AMK/BAM engines have 20mm wrist pin rods, AUQs have 19mm. ATC code (2000-2001 Audi TT) had 20mm rods as well, although still quoted at 180bhp.

Regards,

~Nautilus

Awesome reply!

So out of interest, if you were to head into the realms of 450bhp with a GT30, twin-scroll or something bigger, where would you get a strengthened cylinder head?

 

[csd_19]

cylinder head will begin to crack between cylinder holes around 450bhp.


Regards,

~Nautilus

That's an interesting one! What other sort of mods were on the cars seeing cracked heads?

Only time I've heard of a cracked head was when it overheated and cooked it.

 

[Nautilus]

There were some Big Turbo projects where the users reported cylinder heads cracked either between valves or between cylinder holes. No link currently available.

It can be inferred the Formula 2 engine derivative built from the 1.8T has been limited to 450bhp for this reason. Setups for street racing or drag racing achieved more, but they were not required to be driven at top power for hours at a time.

From my point of view it's purely academic discussion, I would not trust the Leon chassis (suspension, geometry, transmission, driveshafts, tyres etc) to withstand continuous driving under 450bhp and the speeds in straight line or twisties attainable under this kind of power, sooner or later someone will crash into a tree, fence or wall. I'd say double stock power (~360bhp) is the reasonable way to go

~Nautilus